It used to be really pronounced in my grandmother's generation, but you hardly hear it anymore. Virginy for Virginia, Caroliny for Carolina, even Ohiy for Ohio. From my experience with spelling variations in records, it must have been active well back into the 1800s. My dad was from more western Ohio, and they used to do a similar thing with the final vowels, but they'd be reflected as schwa, so Ohiuh, Cincinatuh, Sciotuh. I swear to god, I've even heard "Lake Eruh".